Most useful runesmith "spells"

[Googley Eye'd Bastard]

I've never really been able to use the dwarven runesmiths very well, I've basically just only spammed rune of wrath and ruin but now I'm doing my first ungrim campaign in a long while and I've begun thinking the buff spells would be a lot more useful.

Which spells do you guys think are the best from rune smiths?

[Immortalis]

Rune of slowness is quite handy if you need your ranged units to take care of single entities

[Lunos]

Sometimes Negation can help depending on what you're fighting. Like pitting your Hammerers against AP or monstrous units. Overall the runesmith spells are kinda lackluster and I wish they reduced the CD by about half to make them actually dangerous to face off against.